Why doesn't watchtower update all of the containers specified in the arguments?

[panomitrius]

Describe the bug
Running watchtower for specific containers doesn't work, it only updates 1 of multiple specified containers.

To Reproduce
I'm running the watchtower container with the this bash script:

#!/bin/sh

docker run -d \
    --name watchtower \
    -v /var/run/docker.sock:/var/run/docker.sock \
    -v /etc/timezone:/etc/timezone:ro \
    -v /etc/localtime:/etc/localtime:ro \
    -e TZ="Europe/Stockholm" \
    containrrr/watchtower \
    -d  \
    nextcloud mariadb portainer samba rocketchat`

Expected behavior
Watchtower should update all those docker containers, however it only updates portainer. I've also tried to add rocket.chat hubot-rocketchat dperson/samba as specified containers, but that doesn't change anything.

Environment
Ubuntu 20.04.1 LTS
Linux 5.4.0-56-generic #62-Ubuntu SMP Mon Nov 23 19:20:19 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Docker version 19.03.14, build 5eb3275d40

Logs from running watchtower with the --debug option

2020-12-07T09:10:36+01 [D] Sleeping for a second to ensure the docker api client has been properly initialized.
2020-12-07T09:10:37+01 [D] Retrieving running containers
2020-12-07T09:10:37+01 [D] There are no additional watchtower containers
2020-12-07T09:10:37+01 [I] Starting Watchtower and scheduling first run: 2020-12-07 09:15:37 +0100 CET m=+300.065980923
2020-12-07T09:15:37+01 [D] Checking containers for updated images
2020-12-07T09:15:37+01 [D] Retrieving running containers
2020-12-07T09:15:37+01 [D] Pulling portainer/portainer-ce:latest for /portainer
2020-12-07T09:15:37+01 [D] No credentials for portainer in /config.json
2020-12-07T09:15:37+01 [D] Got image name: portainer/portainer-ce:latest
2020-12-07T09:15:39+01 [D] No new images found for /portainer
2020-12-07T09:15:39+01 [D] Scheduled next run: 2020-12-07 09:20:37 +0100 CET
2020-12-07T09:20:37+01 [D] Checking containers for updated images
2020-12-07T09:20:37+01 [D] Retrieving running containers
2020-12-07T09:20:37+01 [D] Pulling portainer/portainer-ce:latest for /portainer
2020-12-07T09:20:37+01 [D] No credentials for portainer in /config.json
2020-12-07T09:20:37+01 [D] Got image name: portainer/portainer-ce:latest
2020-12-07T09:20:39+01 [D] No new images found for /portainer
2020-12-07T09:20:39+01 [D] Scheduled next run: 2020-12-07 09:25:37 +0100 CET

Additional context

This are my running containers, output from docker ps:

CONTAINER ID        IMAGE                                COMMAND                  CREATED             STATUS                   PORTS                                                                      NAMES

f843aa26e8c2        containrrr/watchtower                "/watchtower -d next…"   21 minutes ago      Up 21 minutes            8080/tcp                                                                   watchtower

582a68f2cdde        rocketchat/hubot-rocketchat:latest   "/bin/sh -c 'node -e…"   16 hours ago        Up 2 hours               0.0.0.0:3001->8080/tcp                                                     rocketchat_hubot_1

3ac5ef433e5f        rocketchat/rocket.chat:latest        "docker-entrypoint.s…"   16 hours ago        Up 2 hours               0.0.0.0:3000->3000/tcp                                                     rocketchat_rocketchat_1

3d16b671921d        mongo:4.0                            "docker-entrypoint.s…"   16 hours ago        Up 2 hours               27017/tcp                                                                  rocketchat_mongo_1

5f9b5f48da05        portainer/portainer-ce:latest        "/portainer"             2 days ago          Up 2 hours               8000/tcp, 0.0.0.0:8787->9000/tcp                                           portainer

06cb7c37c980        dperson/samba                        "/sbin/tini -- /usr/…"   2 days ago          Up 2 hours (unhealthy)   0.0.0.0:139->139/tcp, 0.0.0.0:137-138->137-138/udp, 0.0.0.0:445->445/tcp   samba_samba_1

b5dd47fb8e15        nextcloud                            "/entrypoint.sh apac…"   2 weeks ago         Up 2 hours               0.0.0.0:9000->80/tcp                                                       nextcloud_app_1

4462a9876f6d        mariadb                              "docker-entrypoint.s…"   2 weeks ago         Up 2 hours               3306/tcp      

[piksel]

If you look at the last column of your docker ps you can see that only one of your containers actually use the name you supplied to watchtower. Try running it with nextcloud_app_1 portainer samba_samba_1 rocketchat_rocketchat_1.
The mariadb container does not have a name, but you can set it with docker rename 4462a9876f6d mariadb

[panomitrius]

Thank you, that's it! :)